Agilent / HP 8935  E6380A        Amtronix Instruments, Inc.

E6380A picture  e6380a side view
Here is the Agilent / HP 8935  / E6380A unit. This unit was originally made for CDMA Base Station  Testing but it makes an excellent Service Monitor. HP had 2 different types of  8935 units. One was the E6380A and it included CDMA Tests, the other is the E6381A and it includes TDMA Tests. It's a well built rugged design with an "electro-luminicent" display. The membrane type keyboard is helpful in restricting moisture from getting into the unit. The test connectors are all on the side of the unit. Althow not pictured, there is a cover to protect the front of the unit. This unit is similar but not exactly like the HP 8920B units. It includes similar features and screens like the : RF analyzer, AF Analyzer, RF Generator, Encoder, Decoder, Spectrum Analyzer / Tracking Generator. Also included is  Power Meter, Sinad and Distortion meters, Full Duplex operation, AC/ DC Voltmeter, Self Diagnostic Tests, and Configure Screens. It has 2 AF generators useful for generating 1000Hz tone and CTCSS tones at the same time, 2 uV "off the air" sensitive receiver, AM, FM and SSB modes, 75 Watt continuous or 125 Watt intermittent power input, antenna, duplex and RF I/O ports. It will save and recall screen setups with its internal memory. It uses the more common PCMCIA SRAM cards to install / remove data.

Differences between the E6380A and the HP 8920B
    Here are the main differences between the HP 8920B and the HP 8935 / E6380A units. The 8935 / E6380A does not have the following features found on the  8920B: 1) Duplex Screen (there is a duplex port but no duplex screen).  The E6380A can still be used for full duplex operation. When in the RF Generate screen, it                     will receive through either the RF I/O Port or the Antenna Port and display received power, frequency and deviation or AM modulation.
            2) There are no RX or TX screens. The 8935 does have an RF Generator screen that incorporates the functions found on the 8920B's RX Test and RF                     Gen  screen. The 8935 also has an RF Analyzer Screen that that incorporate the functions found on the 8920B's RX Test and RF Analyzer screens.
            3) The 8935 does not auto count the RF frequency on the RF Analyzer Screen and the 8920B does.
            4) The 8935 does have an encoder and decoder screen like the 8920B units but these screens do not include the DPL, LTR, EDACS or POSCAG                             functions found on the 8920B. The 8935 does encode / decode CTCSS and DTMF.
            5)  The 8935 has 2 IF's like the 8920B units but they are 30 and 230 KHz where the 8920B's IF's are 15 & 230 KHz. The wider 30 KHz IF works well                     for 2 way radio but will hear the above and below adjacent RF channels.
The 8935 has some extra's over the 8920B. The 8935 has spec'd. accuracy from 400KHz-1000MHz and 1.7GHz-2.0GHz.and the  8935 has an "electro-luminicent" display that is much more visable in sunlight and has a longer life than the 8920 type CRT display. An RF_Tools Menu is standard on the 8935 and was a software option for the 8920B units. The RF_Tools menu includes a swept return loss, distance to fault and cable loss program. These programs require the use of a Return Loss Bridge.
RF Tools-1  RF_Tools2  RF Tools 3
RF Tools 4 Here are 4 screen pictures of the 8935 RF_Tools Screens. The selections include Swept Gain, Discrete Freq Insertion Loss, Swept Insertion Loss, Swept Return Loss, Cable Fault and Power Meter. When Swept Return Loss is selected, you can then enter the Start and Stop Frequencies and the Max expected return loss. The 8935 will then show you the proper installation of the return loss bridge to the unit. Picture 4 shows a frequency vs. return loss graph. This is a poor example of a 2 - 30 MHz sweep of a long wire. The dips in the graph show the resonant frequencies.

    Here are the HP / Agilent 8935 / E6380A Screens. They are the  RF Generate, RF Analyzer, AF Analyzer, Spectrum Analyzer, Spectrum Analyzer with Tracking Generator in use, Oscilloscope, Encoder and Decoder.

E6380A RF Gen  E6380A RFA  E6380A AFA
HP 8935 / E6380A RF Generator Screen                             RF Analyzer Screen                                                  AF Analyzer Screen
E6380A SA  E6380A TG  E6380A Scope
       Spectrum Analyzer Screen                                      Spectrum Analyzer in Tracking Generate Mode         Oscilloscope
E6380A configSome of these pictures aren't the sharpest but it's easy to note that they are very similar to the 8920B units.
Configure Screen
Using the E6380A Test Set
       The E6380A Test Set has several screens for analog use. To access these screens, rotate the curser knob on the front panel until the curser is on the top most field known as the title bar. Select this field by pressing in the curser knob. With the field highlighted, rotate the curser knob and the different fields will scroll. To select one, stop on it and select it. The scroll knob can now be used to move the curser to different fields on te screen. Fields are changed by selecting the field and rotating the curser knob of using the keyboard to enter numbers / letters. To make the test set boot to the analog RF Generator field, your test set has this field saved as "POWEON". (in the save / recall menu) For more information on using the E6380A, see the analog section of the E6380A Reference Manual .

Differences between HP 8920A/B, 8924C, E8285A and HP E6380A

Capture the 8935 screen to your PC

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